OFFSET
1,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..100
MATHEMATICA
Select[Table[Sum[EulerPhi[i]/GCD[m, i], {i, m}], {m, 2000}], IntegerQ] (* Harvey P. Dale, Jun 05 2012 *)
PROG
(PARI) lista(nn) = {for (n = 1, nn, if (type(v = sum(i=1, n, eulerphi(i)/gcd(n, i))) == "t_INT", print1(v, ", ")); ); } \\ Michel Marcus, Nov 20 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Jan 26 2002
EXTENSIONS
More terms from Michel Marcus, Nov 20 2013
STATUS
approved